Line valve



Oct. 5, 1926. 1,602,279

R. M. MANNING LINE VALVE Filed July 20, 1923 WITNESS: ATTRNEY Patent ed Oct. 5, 1925.

ROBERT M. MANNING, 0 1 TULSA, OKICAHQMA.

Lima vnnvn.

Application filed July 20, 1928. Serial n. 652,827.

This invention relates to valves and has for-an object the provision of a valve es? pecially adapted for use in pi e' lines in oil fields, for controlling the from the tanks. I

Another object of the invention is the provision of a line valve which will permit free flow of oil when'the line is open, but will prevent back pressure and will automaticall y close the lineto keep out air after the tank has flow. With the above and other objects in view, theinvention further includes the following novel features and details of construction,- to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings: Figure l'is a diagram illustrating the use of the invention. Figure 2 is an enlarged-sectional view of the invention per se.

Referring in detail to the drawings wherein like characters of reference denote correspondlng parts, the reference character" 10 indicates a tank from which oil .is adapted to flow by gravity and under the influence of a vacuum pump indicated at 11, a pipe or conduit 12 connecting the pumpand tank. The pipe is provided adjacent tle tank 10 with a manually operated valve 1 v Located within thepipe or conduit 12 is a manually operated valve 14 of suitable type which is adapted to be opened to permit flow through-the pipe or conduit 12, while connected to this pipe and communicating therewith upon opposite-sides ofthe valve 14 is a by-pass pipe 15) Includedin the pipe 15 is a relatively large valve casing 16 which is provided with spaced valve. seats 17 and 18, while located within the casing 16 is a float 01'- valve member 19. This float or valve member may be formed-of alumi num or other suitable material.

This invention is intended for use in field lines where the,oil from a number of tanks runs out by gravity, the flow of oil being as sisted by vacuum created by a suctionpump located at a station on the. eiving "end of the line, this station bei located at a lower level than are the t s. The. drawing only shgws one tank, but it is understood that each tank is provided with a trap and ow of oil been emptied and the oilceases to all the lines are connected with the line to which the pump is connected at a point between the trap and the pump. When a tank is emptied, the' air following the oil, will be prevented from entering the pump by the Valve 19 seatingitself on the lower seat 18 and the valve will be held on this seat through-the suction created by the pump and by gravity. Then when the tank is re-. 'filled and isjto be emptied again, the valve l3 is opened, as is also the valve 14. This opening of the valve 14 breaks the suction whichholds the valve 19 on its seat 18fand then said valve 14 is closed again. Then the oil will flow from'the tank into the casing 16, floating the valve 19, and passing from the casing through-the ipe 15 into, the pump line, the oil flowing y gravity and the suction created. by the pump, as before explained. As soon as the tank is emptied, the air following the oil will be prevented from entering the system by the seating 'of the valve l9,"as before explained. Ifoil pressure should occur in the pipe which connects the trap with-the pump, due to the flow of oilfromthe other tanks, the valve 19 would be seated upon the upper seat 17 by this pressure and thus the oil from the other-- tanks would be prevented from entering the first tank and overflowing thegsame.

' Thus the device has a two-fold purpose.

It prevents air from gettinginto the, umping. system and it also prevents back ow of oil from other tanks into the tank with whichit is associated.

-The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as proper- -ly fall within the scope of the appended claim.

Having". described the invention what is" claimed is An. apparatus of the class described comprising in combinatidn with'a conduit, a manually operated valve, a by-pass'rommunicati/ng with the conduit, upon opposite sides of sald valve and a valve located within the by-pass, said valve embodyin a relatively large casing, oppositely locate spaced valve seats therein and. a float located between and adapted .to engage either of the seats to close the by-pass. 1 In testimony whereof I aflix mysignature;

I ROBERT M. MANNING. 

